28317881847 has 16 divisors (see below), whose sum is σ = 38149258752. Its totient is φ = 18683333760.

The previous prime is 28317881843. The next prime is 28317881861. The reversal of 28317881847 is 74818871382.

It is not a de Polignac number, because 28317881847 - 2² = 28317881843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28317881843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46063 + ... + 242399.

It is an arithmetic number, because the mean of its divisors is an integer number (2384328672).

Almost surely, 2^28317881847 is an apocalyptic number.

28317881847 is a deficient number, since it is larger than the sum of its proper divisors (9831376905).

28317881847 is a wasteful number, since it uses less digits than its factorization.

28317881847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196838.

The product of its digits is 4816896, while the sum is 57.

The spelling of 28317881847 in words is "twenty-eight billion, three hundred seventeen million, eight hundred eighty-one thousand, eight hundred forty-seven".